989879087 has 4 divisors (see below), whose sum is σ = 990116736. Its totient is φ = 989641440.

The previous prime is 989879071. The next prime is 989879161. The reversal of 989879087 is 780978989.

989879087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 780978989 = 7 ⋅111568427.

It is a cyclic number.

It is not a de Polignac number, because 989879087 - 2⁴ = 989879071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989870087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112463 + ... + 120944.

It is an arithmetic number, because the mean of its divisors is an integer number (247529184).

Almost surely, 2^989879087 is an apocalyptic number.

989879087 is a deficient number, since it is larger than the sum of its proper divisors (237649).

989879087 is a wasteful number, since it uses less digits than its factorization.

989879087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237648.

The product of its (nonzero) digits is 18289152, while the sum is 65.

The square root of 989879087 is about 31462.3439527318. The cubic root of 989879087 is about 996.6149164725.

The spelling of 989879087 in words is "nine hundred eighty-nine million, eight hundred seventy-nine thousand, eighty-seven".